ConnectorTarget ct = new LinkTarget();
setConnectorTarget(ct);
setEdgeRenderer(new LinkRenderer());
_menuCreator = new MenuCreator(null);
_menuCreator.setMouseFilter(new PopupMouseFilter());
interactor.addInteractor(_menuCreator);
// The contents of the menu is determined by the associated
// menu factory, which is a protected member of this class.
// Derived classes can add menu items to it.